OpenXiangShan edb1dfaf7d290ae99724594507dc46c2c2125384 denial of service

Summaryinfo

A vulnerability has been found in OpenXiangShan XiangShan edb1dfaf7d290ae99724594507dc46c2c2125384 and classified as problematic. This affects an unknown function. The manipulation leads to denial of service. This vulnerability is uniquely identified as CVE-2026-29644. Local access is required to approach this attack. No exploit exists.

Detailsinfo

A vulnerability was found in OpenXiangShan XiangShan edb1dfaf7d290ae99724594507dc46c2c2125384. It has been rated as problematic. This issue affects an unknown part. The manipulation with an unknown input leads to a denial of service vulnerability. Using CWE to declare the problem leads to CWE-404. The product does not release or incorrectly releases a resource before it is made available for re-use. Impacted is availability. The summary by CVE is:

XiangShan (open-source high-performance RISC-V processor) commit edb1dfaf7d290ae99724594507dc46c2c2125384 (2024-11-28) has improper gating of its distributed CSR write-enable path, allowing illegal CSR write attempts to alter custom PMA (Physical Memory Attribute) CSR state. Though the RISC-V privileged specification requires an illegal-instruction exception for non-existent/illegal CSR accesses, affected XiangShan versions may still propagate such writes to replicated PMA configuration state. Local attackers able to execute code on the core (privilege context depends on system integration) can exploit this to tamper with memory-attribute enforcement, potentially leading to privilege escalation, information disclosure, or denial of service depending on how PMA enforces platform security and isolation boundaries.

It is possible to read the advisory at github.com. The identification of this vulnerability is CVE-2026-29644 since 03/04/2026. The exploitation is known to be easy. Attacking locally is a requirement. The technical details are unknown and an exploit is not publicly available.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Vendor

• OpenXiangShan

Name

• XiangShan

Version

• edb1dfaf7d290ae99724594507dc46c2c2125384

Website

• Product: https://github.com/OpenXiangShan/XiangShan/

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